Bolt



M. K. SESSLER. BOLT.

APPLICATION FILED MAR- RENEWEDQCT- 8. |92l Y Y 1,415,487, Patented May 9,1922.v

D M wx@ Applicationled March 29, 1919, Serial No. 288,144. Renewed Octob MARCEL K.

snssnnn,

` or New YORK, 1v. Y.

BOLT.'

One of they objects is to provide apparatus vof the above type'wliich shall be ysimple in `construction and reliable in use.

Another object is to provide apparatus of the above type which may be produced" atrelatively low cost and which requires a minimum of attention when once applied.

Another Objectis to provide apparatus of the above type consisting of few parts,

relatively inexpensive in execution.l

Other objects will be in part obvious and in part pointed out hereinafter.

In the accompanying drawings, wherein areshown, for purposes of illustration, one

or more of various possible embodiments of the several features of this invention,

embodiment of my invention.

line 2-'2 of Fig. l.

Fig. a is, an and View 'of thev boit or rig.

1, viewed from the right end.

Fig. l is a view similar to Fig.y 3 of a slightly modified form of the invention.

5 is a fragmentary detail view of the end of the bolt of Figs. land 2. i Fig. 6 is a view generally similarto Fig.

5 of a somewhat modified form of bolt with the wedgiiig member in place, and' Fig.v 7 is a view similar to Fig. 6 ofa still further modification.

Referring now to Figs. 1,2, and 3 of the drawings, I have shown a section of rail 1 having an end 2. Extending' in parallelism to said rail, and on opposite sides thereof, are provided the usual splice4 plates or iisli plates 3. `A bolt 4l, having a head :Sand-1 a shank 6, extends transversely through aligned openings 7 'in the splice plates and railand is `imly secured in place byineans of a. vwedging construction, one form 'of' which will now be described in detail.

rllliis form of my wedging member comprises an integral staple-like element Shav-v ing a crosspiece 13 and twolegs 9 and 10,

the staple on one side of the cross piece be- Specieation of Letters Patent of which-the following is a specifiand in parbeing correspondingly shortened as4 at Fig. 2, is a sectional view taken along the f in avertical plane as er s,1921; serial ivo.V 566,486. i

ing preferably fiat and perpendicularr vto l the crossfpiece'as at 11, anden the other the elements sloping the length of thestaple asfshown at 12. The inner sides of the are preferably plane, and perpendicular to shownat-l.' f Y The bolt ispreferablysinooth, thatis, un-

th'e end of the shank complementaryy to that ofthe conveX'surface 12 ofthe vwedging member.v and a'metliod of application which' shallbevv For convenience of :manufacture the side'- preferably; cylindricallyV convex with ,60

legsvv Y parallel to each other,v j f kthe cross piece 8 as"1e threaded from end to end, and tlieshaiik-is. provided on opposite vsides with parallel slots or grooves 15,' at one portion yof. its length,v l x each slot or groove having vthe side nearest -f i extending obliquelyV thereof'as at 16 yandbeingA shapedfto; form va concave shoulder', as atl74 cfa shapel Y v -grooves lmay be formed by a. simple millingo'r swaging.operation forming the side 1 18 of the slot parallel to' side I16.

' The" legs of `the wedging member 8 arek preferably enlarged at tlieouter side of their ends,"as lat19, toform an oblique shelf 2O.l If desired, `this shelf construction "can be Fig. 1, is a viewy in cross section of oneA dispensed with on one ofthe legs,l said leg"- 5 abuts one of the. splice plates, thefwifdth of slots orv vgrooves 1 5 preferablyextending ings., Thereupon' the wedging member 8 is inserted' to st'fraddle the bolt'at v'slots 1 5, the* sides 14 vvof the staple legs closely'contacting the said slots throughout substantially thewidtl ofv the shank as shown in Fig. 3.

'place by` being 'driven either fro'mjthe top or shown in Athe drawn `Then the wedging member is forced-'in from'- `the side, it becomes firmly engaged`v` with the faces of theslotsfor grooves 15 in the bolt shank as vw'ell'as with; the shoulders places the bolt-under ytension Iand the;` l'splice plates are forced into firm engagement ywith portion of.. one-or both-of the legs 9 and 10 (toward the central section of the staple, as. clearly shown in Fig. 3, thereby preventingvv '17 land the lface-of one of tlie'splice plates.,- as at 11j The re-action -of the oblique sides, 12 against shoulders 17 of the bolt shank- Y any undesired loosening or removal of the wedging member.

The arrangement of a wedging member convex on one side and fitting against a correspondingly concave shoulder 17, as in Figs. l, 2, and 5, brings about a substantial initial bearing surface between the wedging member and the bolt and a radial distribution of shearing forces.

ln place of the arrangement just described, l may form my shoulder i7 to cooperate with any other staple conformation as for instance that shown in Figs. 6 and 7, in which the shoulder l is plane and slopes toward one end of the shank. The latter arrangement causes a distribution of the shearing forces of the wedging member toward the centre of the bolt.

Fig. 4 shows an alternative form of bolt shank 6 which is square rather than circular in cross section.

ln Fig. 7 l have shown two parallel serrated series of angular slots l5', disposed similarly to slots l5 extending obliquely of the shank as shown at 16 and co-o )eratinff with simon the innermost sides le of the legs of the staple S. By this arrangement, the shearing tendency of the wedging member is distributed over a relatively great surface area without materially diminishing the cross sectional area of the bolt at this portion.

lf instead of my wedge lock lock nuts, washers, or the like, to furnish a secure lock for my bolt, not only would the initial cost be increased, due to added parts, out both the cost of installation and the cost of maintenance would be materially higher.

While my bolt is particularly designed for use in the splicing of rails, it is nevertheless of general application being useful in substantially any relation in which a bolt is employed.

Although l have shown my wedging member staple-like in form it is to be understood that other forms of wedging members may be employed to advantage.

ilar serrations 2l l relied upon ils many changes could be made in thev above construction and many Vapparently widel*T diiferent embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having thus l claim as new and desire to secure ters Patent is l. )t lock u.bolt comprising a bolt member having a head and a shank, and a wedging member cooperating with said shank, said shank being cut away to form diametrically opposite recess faces terminating at the outer ends shoulders each inclined along the described my invention,what by Let recess face and undercut from the periphery of Athe shank to said recess face, said wer. ging member comprising a cross piece and two depending legs, said legs being spaced apart to straddle the neck of said shank` and each being straight on one side, tapered on the other side to form a wedging surface, adapted to cooperate with one of said shank shoulders, and provided at the extremity with a ledge adapted to be bent inwardly, after said wedging member is in position, to engage under said shank.

2. A lock bolt. comprising a bolt member having a head and a shank, and a wedging member cooperating with said shank, said shank being cut away to form a recess face terminating at the outer end in a shoulder inclined along the recess face, said wedging member comprising a cross piece and two depending legs, said legs being spaced apart yto straddle the neck of said shank, and each being straight onone side, one of said legs tapering on the other side to form a wedging surface adapted to cooperate with said shank shoulder, and one of said legs being provided at the extremity thereof with a ledge adapted to be bent to lock said wedging member in position.

3. A lock bolt comprising a bolt member having a. head and a shank, and a wedging member cooperating with said shank, said shank being provided with a shoulder in* clined along its juncture with the shank, said wedging member comprising a U-shaped member adapted to straddle said shank and having one side thereof straight, and one` leg thereof tapered on the Aopposite side to from a wedging surface adapted to cooperate with said shank shoulder, and one leg hereof provided at the extremity with a ledge adapted to be bent to lock said wedging member in position.v

4. A lock bolt comprising a bolt member having a head and a shank, and a wedging member cooperating with said shank, said shank being cut away to form a recess face terminating` at the outer end in a shoulder, said wedging member comprising a U- shaped member adapted to straddle the neck of said shank, and having one leg tapered to form a surface adapted to cooperate with said shank shoulder, and one leg provided at the extremity thereof with a ledge adapted to be bent to hold said wedging member in position.

5. A lock bolt comprising a bolt member having a head and a shank, and a wedging member cooperating with said shank, said shank being cut away to form diametrically opposite recess faces terminating at the outer ends in shoulders each inclined along the recess face and undercut from the periphery of the shank to said recess face, said wedging member comprising a cross piece and two depending legs, said legs being spaced apart to straddle the neck of said shank, and i opposite .recess faces terminating at the outer ends in shoulders each inclined .along the recess face and undercut fromthe pe-` riphery of the shank to said recess face, said wedging member. comprising a-cross piece and two depending legs, said legs being spaced apart tostraddle the neck of said shank, vand each being straight on one side and tapered on the other side to forma weidging surface adapted to cooperate with one of said shank shoulders.

7. A lock bO'lt'cOmpriSing ,a bolt member having a head and a shank, and a wedging member cooperatingwith said shank, said shank being cut away'to form oppositevrecess faces terminating at the outer ends in shoulders each inclined along the recess'face and undercut from the periphery ofthe shank to'saidrecessface, said wedging member comprising a cross piece and two depending legs, -said legs being spaced apart to straddle the neck of said shank, and each tapering on one side to form a wedging surface adapted to cooperate with one of said shank shoulders.

8. A lock bolt comprising a bolt member having a head and a shank, and a wedging member cooperating with said shank, said shank being provided with shoulders, each inclined along yits juncture with said shank and undercut from its outer edge to its juncture with said shank, said wedging member comprising a U-shaped member adapted toy straddle said shank and having each' leg tapered to form a wedging surface adapted to cooperate with one of said shank shoulders. 9. A lock bolt comprising a bolt member having a head and a shank, and a wedging member cooperating with said' shank, said shank being cut away to form opposite re-v cess faces terminating at the outer ends in shoulders each inc-lined along the recess face, said wedging member comprising a cross piece and two depending legs, said legs being spaced apart to straddle the neck of said shank, and each being' straight on one side, tapered on the other side to form a wedging surface adapted to cooperate with one of said shank shoulders, and provided with a ledge adapted to be bent inwardly, after said wedging member is in position, to engage under said shank.

10. A lock bolt comprising a bolt member member cooperating with said having a head and a shank,`Y and a wedging member cooperating with said y'shank, vsaid l Shank being cut away-to form opposite recess' faces terminating -atthe outer ends in shoul# derseach inclined along the recess face, said wedging'inember comprising a cross piece and twoy depending legs, said legs being spaced apart vto straddle the neckfof saidV shank, and each being straightI on one side and tapering on v*the other side tol forma wedging surface adapted to 'cooperate-with one of said shankfshoulders, one ofl saidlegs being provided with aledge',l adapted to be bent inwardly, after said wedgingmember is in position, to-engage under said shank.

f il. A lock bolt comprising a bolt member having ahead and a shank, and a'wedging member cooperating with said shank, said' away to form opposite recessshank being cut faces terminating at tlieouterendsinv shoulders each inclined along the .recess face, ysaid.

wedging member ycon'iprising a cross piece and two 'depending legs, ksaid vlegs being spaced apart to straddle the neck of ksaid shank, and each tapering on one side lto form a wedging surface adapted to cooperate with one of said shankshoulders, .one ofsaid legs being providedwitli a ledge adaptedto be bent inwardly, yafter said wedgingmemberfis in position, `to engage'undersaid shank. v

l2. A lock bolt comprising a` bolt member having. a head and a shank, and a wedging member cooperating with said shank, vsaid shank being provided at its outer endwith a shoulder inclined at its juncture with the shank, said wedging member comprising a-` lU-shaped member adapted to straddleusaid shank and having one of the legs thereof tapered on one side to form a wedging surface adapted tov cooperate with said shank shoulder, and having one of the legs thereof provided at its extremity with a ledge adapted to be bent inwardly,

member isvin position, to shank.

' 13. A lock bolt comprising a bolt member having a vhead and a shank,and a wedging shank, said shank being provided near the free vend thereof with a shoulder, said wedging member comprising a U-shaped member adapted after said wedging. engageunder said to straddle said shank and having one leg thereof positioned to engage said shoulder, one i' leg of said Ushaped member being provided' at-the extremity 'thereof with a ledge adapted to be bent-inwardly,`after said wedging member is inl shank.

' 14. 1n a rail splice` acombination, 'a rail, a splice plate parallel thereto,andoverlap-k ping the end thereof, a bolt passing transversely of said rail and said plate, .a rigid` staple-like member straddling said bolt, said member having a shelf integral with one leg thereof, whereby a blow upon said shelf will` position, to engage under said.

distort said member to positively prevent its removal from said bolt. v

15. ln a rail splice, in combination, a rail, a splice plate parallel thereto, and overlapping the end thereof, a bolt passing transd versely of said rail and said plate, a rigid staple-like `member straddling said bolt,

means to prevent relative rotation between said bolt and said straddling member, said member having an integral shelf on each leg, whereby a blow upon said shelf will distort said member to positively prevent its removal from said bolt.

16. In combination, two metallic plates, a bolt passing transversely thereof, a staple formed Wedge straddling said bolt, said bolt being grooved to accommodate the legs of said Wedge, one face of said Wedge resting against one of said plates and one of said legs having` a shelf, as and for the purpose described.

17. ln a rail splice, in combination, a rail, a pair of splice plates parallel thereto, on opposite sides of the rail end, a bolt extending transversely of said plates and said rail, and having a head substantially against one of said plates, a staple-formed vvedging member straddling said bolt, said bolt being slotted to fit an effective Wedge face on each leg of said Wedging member, the other effec.-

having a plane vertical face, and a convex oblique face, said bolt being slotted-to lit the convex Wedge face on each leg of said staple, the plane wedge faces being pressed against the adjoining splice plate, and means for positively preventing removal of said wedge member.

19. As an article of manufacture a lock bolt, comprising a boltV member having a head and a shank, said shank having faces extending obliquely thereof, and a staple-like Wedging member adapted to straddle said bolt with its legs in contact with said faces, one said leg having a shelf as and for the purpose described.

ln testimony whereof, I have signed my name to this specification this 22 day of March, 1919.

MARCEL K. SESSLER. 

